- Change a way to compare source port number in natpt_lookForRule6().   Iff source port number of translation rule is non-zero value then   compare to incoming v6 packet, or, sometime this produces puzzling   error like ICMP6_TIME_EXCEEDED.
- Change a way to compare source port number in natpt_lookForRule6().
  Iff source port number of translation rule is non-zero value then
  compare to incoming v6 packet, or, sometime this produces puzzling
  error like ICMP6_TIME_EXCEEDED.

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame